my 2008 tahoe blower will not blow at all! It was working fine yesterday and today nothing and it happens to be 30 degrees, whats could be the issue...I havent tried anything because I was coming to class and didnt have the time.

 

It could be several things. Always start with the simplest. Check all of your fuses first.

 

Welcome to the forum.

Has any work been done on the vehicle recently? If so, check for wiring connections being dislodged.